Company has been precision manufacturing New Z-Mill bearings to
exacting tolerances that meet or exceed the most demanding industry
standards for over 16 years. An uncompromising dedication to quality
control, coupled with the most modern equipment, the highest-grade
materials and performance-tested craftsmen, provide you with the
best performance guarantee in the business.
Sendzimir Bearing Re-Grind Procedure
The bearings are received, identified, cleaned and inspected. A
pre-grind inspection is conducted on every single bearing. The inspection
results are listed on a pre-grind report along with special notes
and cost of repairs. The report states what needs to be done to
the bearing in order to get them back to OEM specification and if
any parts need to be replaced.
Please note, that certain properties of the bearing can only be
checked when the bearings are ground on the outside diameter, and
therefore the cost of repairs may change slightly to accommodate
for the additional repair cost, i.e. Concentricity of race to OD.
This report is faxed to the customer for review and at this stage
the customer may or may not opt for the repairs. The customer is
not charged for any of the work done to this point, even if they
decide not to conduct the repairs. Only when the customer sends
us a written purchase order, will the repair work commence.
Each bearing is individually polished on the races with special
lapping compound and scotchbrite to clean up any minor imperfections
The rollers are individually vibratory tumbled in sets, in order
not to mix up rollers from another bearing. In case of a double
row, three lipped bearing, the individual rows of rollers are marked
in order to ensure that they are replaced in the same order. Vibratory
tumbling is a non-stock removal process which removes any burnt
grease or dirt and smoothes over irregular peaks on the surface
in order to provide a smoother surface finish. The cages are cleaned
in a solution to remove any debris and dirty oil. If the cages are
caked with burnt grease, they will be sandblasted to remove the
The bearing is then re-assembled and ready for OD grinding.
The OD is rough ground in order to remove all imperfections on the
surface. At this stage the bearing can now be checked for run-out
under a .00001" gauge. If the run-out is within .0002"
then the bearing can be finish ground.
The rough ground bearings are matched in sets in order to achieve
sets of equal section heights according to the customers requirements.
The bearings are then finish ground on the OD to achieve the required
section height. They are one hundred percent inspected for section
height, taper, run-out and surface finish. The bearing is etched
with the new section height number, and marked on the final inspection
The bearing is dipped in a rust preventive solution, wrapped in
a moisture resistant paper wrap, covered with a plastic moisture
resistant bag and boxed in a Bearing Service Compny designed bottom
and lid style double sided cardboard box, and strapped to a pallet
or placed in a wooden crate for shipment.
The final inspection report with the new section heights, and old
vs. the new OD dimensions and other relevant data for accurate tracking
by the customer, is shipped along with the product. Bearing Service
the customer to keep those on file for history, assistance in setting
up PM programs, tracking and budgetary reasons.
Incoming freight is paid for by the customer and Bearing Service
Company re-ground product is shipped back at Bearing Service Company's
Technical Assistance and Communication:
Bearing Service Company has an open door policy. Any customer is
welcome to visit our manufacturing facility to witness our first
class manufacturing and re-manufacturing operation. Bearing
Service Company also provides technical assistance with related
issues and the customer has access to direct communication with
the technical shop personnel for status on re-grind or new manufactured
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